https://www.microscopeworld.com/accessories/reticles-and-stage-micrometers/?page=2
Microscope Measuring Reticles & Stage Micrometers - Page 2
Microscope measuring reticles and Stage Micrometers. Reticles are available in rulters, grids, cross-lines, crossed scales, and calibration targets.
stage micrometersmicroscopemeasuringreticles
https://www.edmundoptics.ca/c/image-analysis-stage-micrometers/1102/
Image Analysis & Stage Micrometers Test Targets | Edmund Optics
image analysisstage micrometerstesttargetsedmund